American Airlines Group Inc. is a holding company. Its primary business activity is the operation of a major network air carrier, providing scheduled air transportation for passengers and cargo through its hubs in Charlotte, Chicago, Dallas/Fort Worth, Los Angeles, Miami, New York, Philadelphia, Phoenix and Washington, D.C. and partner gateways, including in London, Doha, Madrid, Seattle/Tacoma, Sydney and Tokyo, among others. Together with its regional airline subsidiaries and third-party regional carriers operating as American Eagle. Its cargo division provides a wide range of freight and mail services, with facilities and interline connections available across the globe. It operates approximately 977 mainline aircraft supported by its regional airline subsidiaries and third-party regional carriers, which together operate an additional 585 regional aircraft. Its subsidiaries include American Airlines, Inc., Envoy Aviation Group Inc., PSA Airlines, Inc. and Piedmont Airlines, Inc.